Re: [PATCH]: UIO read(2)/write(2) overrides

["gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>]

On Fri, Mar 21, 2014 at 02:20:11PM +0000, Matt Sickler wrote:
> Tiny patch to let uio-based drivers override the read(2), write(2), and poll(2) syscalls.
> The rationale is that some uio-based drivers might want the mmap(2) functionality
> of UIO, but have no need for the IRQ semantics of read(2) and write(2).

Can you submit a driver that uses these new interfaces as well?  I don't
want to add something that isn't used in the kernel.

> 
> Signed-Off-by: Matt Sickler <Matt.Sickler@daktronics.com>
> ---
> diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
> index a673e5b..da1bfc8 100644
> --- a/drivers/uio/uio.c
> +++ b/drivers/uio/uio.c
> @@ -505,6 +505,9 @@ static unsigned int uio_poll(struct file *filep, poll_table *wait)
>     struct uio_listener *listener = filep->private_data;
>     struct uio_device *idev = listener->dev;
> 
> +   if (idev->info->poll)
> +       return idev->info->poll(filep, wait);
> +

Your email client ate all the tabs and created a patch that can't be
applied :(